Results 191 to 200 of about 358,569 (255)
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Syntheses Using Pyridinium Salts
Angewandte Chemie International Edition in English, 1963AbstractThis review discusses syntheses leading to a new type of N‐vinylpyridinium salts, to novel anionocyanines, to aminophenazines and alloxazines, as well as to (aza‐) dehydroquinolizinium, acridizinium, and morphanthridizinium salts. In addition, Mannich reactions and aminoalkylations at active methylene groups of cycloimmonium salts, and their ...
exaly +2 more sources
Tandem Ring-Contraction/Regioselective C-H Iodination Reaction of Pyridinium Salts.
Journal of Organic Chemistry, 2023A facile route for direct access to the 4-iodopyrrole-2-carbaldehydes from pyridinium salts has been successfully developed, which undergoes cascade pyrrole-2-carbaldehydes construction/selective C4 position iodination process.
Juan Tang +8 more
semanticscholar +1 more source
Accounts of Chemical Research, 2022
ConspectusThe radical-mediated C-H functionalization of pyridines has attracted considerable attention as a powerful tool in synthetic chemistry for the direct functionalization of the C-H bonds of the pyridine scaffold.
Myojeong Kim, Yejin Koo, Sungwoo Hong
semanticscholar +1 more source
ConspectusThe radical-mediated C-H functionalization of pyridines has attracted considerable attention as a powerful tool in synthetic chemistry for the direct functionalization of the C-H bonds of the pyridine scaffold.
Myojeong Kim, Yejin Koo, Sungwoo Hong
semanticscholar +1 more source
Journal of Organic Chemistry, 2023
Adducts of 1-alkyl-2-imidazolines and two molecules of alkyl propiolate, possessing an N-propargyl-β-enaminoester fragment, easily undergo a domino reaction to form pyridinium salts with β-(alkylammonio)ethyl group at the nitrogen atom in the presence of
N. Golantsov +5 more
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Adducts of 1-alkyl-2-imidazolines and two molecules of alkyl propiolate, possessing an N-propargyl-β-enaminoester fragment, easily undergo a domino reaction to form pyridinium salts with β-(alkylammonio)ethyl group at the nitrogen atom in the presence of
N. Golantsov +5 more
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Recent advances in difunctionalization of alkenes using pyridinium salts as radical precursors.
Chemical Communications, 2022In this review, we summarise the recent applications of pyridinium salts in the radical-mediated difunctionalization of alkenes. Pyridinium salts are a privileged class of compounds that show great utility in natural products and synthetic chemistry ...
Yanan Wang +5 more
semanticscholar +1 more source
Organic Letters, 2022
Although trifluoromethyl alkenes have great synthetic potential, their 1,2-difunctionalization has been a challenge. In this Letter, we disclose the first 1,2-dicarbofunctionalization of trifluoromethyl alkenes with pyridinium salts via a cascade process
Shu-jie Chen +7 more
semanticscholar +1 more source
Although trifluoromethyl alkenes have great synthetic potential, their 1,2-difunctionalization has been a challenge. In this Letter, we disclose the first 1,2-dicarbofunctionalization of trifluoromethyl alkenes with pyridinium salts via a cascade process
Shu-jie Chen +7 more
semanticscholar +1 more source
Journal of Organic Chemistry, 2022
Nucleophilic recyclization of pyridinium salts involving a CCN interchange ring transformation for the synthesis of 2-methylnicotinonitrile derivatives was herein developed.
Xiaoxiao Duan +9 more
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Nucleophilic recyclization of pyridinium salts involving a CCN interchange ring transformation for the synthesis of 2-methylnicotinonitrile derivatives was herein developed.
Xiaoxiao Duan +9 more
semanticscholar +1 more source
Visible-Light-Induced C4-Selective Functionalization of Pyridinium Salts with Cyclopropanols.
Angewandte Chemie, 2021The site-selective C-H functionalization of heteroarenes is of considerable importance for streamlining the rapid modification of bioactive molecules. Herein, we report a general strategy for visible-light-induced β-carbonyl alkylation at the C4 position
Mari Vellakkaran +2 more
semanticscholar +1 more source
European Polymer Journal, 2019 A fast and simple synthetic route towards a new family of poly(ionic liquids) based on aromatic crosslinked poly(azomethine-pyridinium) salts is described.
Eva M Maya +2 more
exaly +2 more sources
Polymer Chemistry, 2021
Poly(pyridinium salts) (PPS) with positive charges on the backbones was designed and synthesized from the transformation of bispyrylium salts.
Xiaorui Li +6 more
semanticscholar +1 more source
Poly(pyridinium salts) (PPS) with positive charges on the backbones was designed and synthesized from the transformation of bispyrylium salts.
Xiaorui Li +6 more
semanticscholar +1 more source